Andrew Hodges 1983 ISBN 0-8027-7580-2 (Walker and Company, New York), 2000 paperback (the original...
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Andrew Hodges 1983 ISBN 0-8027-7580-2 (Walker and Company, New York), 2000 paperback (the original hardback 1983 edition is out of print) Reissued 2014: Alan Turing: The Enigma;